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प्रश्न
State whether the following is True or False.
Coal takes millions of years to form.
पर्याय
True
False
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उत्तर
True
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संबंधित प्रश्न
Why are we looking at alternate sources of energy?
Classify the following into renewable and non-renewable sources of energy:
Coal, Wind, Tides, Petroleum,Wood, Natural gas
Name any four fractions obtained from petroleum which are used as fuels.
Why is LPG considered a good fuel?
The main constituent of petroleum gas is:
(a) methane
(b) ethane
(c) butane
(d) propane
Which of the following is not produced by the burning of fossil fuels?
(a) nitrogen oxides
(b) sulphur oxides
(c) sodium oxides
(d) carbon oxides
The product of petroleum used to drive heavy vehicles like trucks is:
(a) petrol
(b) kerosene
(c) diesel
(d) carbon oxide
Which of the following is not an example of a biomass energy source?
(a) wood
(b) biogas
(c) atomic energy
(d) cow-dung
Most of the sources of energy that we sue represent stored solar energy. Which of the following is not ultimately derived from the sun's energy?
(a) wind energy
(b) geothermal energy
(c) fossil fuels
(d) biomass
The fuel which is not obtained from biomass is:
(a) firewood
(b) cow-dung cakes
(c) coke
(d) charcoal
Fill in the blank
_______is the coal with the highest percentage of coal.
Choose the correct answer.
The coal that has the highest percentage of carbon is
State whether the following is True or False.
Coal and petroleum are renewable energy resources.
Why is charcoal considered better fuel than wood?
Acid rain happens because ______.
Air is a natural resource and cannot be exhausted by human activities. It is known as inexhaustible natural resource. Which of the following is another inexhaustible natural resource?
The underlined word in the following sentence have been jumbled up. Write them in their correct form.
Nutsgilh is an example of inexhaustible natural resources.
Write True/False against the following statement.
Resources which are present in unlimited quantity in nature are called exhaustible natural resources.
Complete the crossword in figure with the help of the clues:
Across
1. Fuels obtained from dead remains of living organisms. (6, 5)
2. A process by which the various constituents of petroleum are separated. (8)
3. A porous black substance obtained from coal. (4)
4. Another name for motor fuel. (6)
Down
5. The substance obtained by carbonisation. (4)
6. Fuel for heavy motor vehicles. (6)
7. A petroleum product used for road surfacing. (7)
8. Dead remains of sea animals got converted into it. (9)
